Am i really bi or what?

when i turned 10 (im 13 now) i started to notice other guys bodies and think they were hot (im a guy) i never have sexual urges for them and i think guy "parts" are a bit gross but i like looking at abs and muscles. its beginning to go away and when i was in my cousins pool, me and 3 other boys got stuck in a round tube raft. we were all rubbing up against each other and i felt uncomfortable and did not get hard. (i only get hard from girls) if i rub up against a girl i will get hard so am i really bi?